In article , Cheeky
writes
The short answer is that it's a SPAD (Signal Passed At Danger) Indicator.
[...]
Several around the west end of Leeds as well.

I'll just add a note: while SPADIs are marked with the signal or signals
that they relate to, the rulebooks says that *any* driver seeing one
illuminate should stop as soon as possible and wait for the signaller to
decide who moves first.

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